a(n) = number of positive integers b which, when added to the number of their divisors, tau(b), gives n.

A036431

a(n) = number of positive integers b which, when added to the number of their divisors, tau(b), gives n.

Terms

    a(0) =0a(1) =1a(2) =0a(3) =1a(4) =1a(5) =0a(6) =2a(7) =0a(8) =1a(9) =1a(10) =0a(11) =2a(12) =1a(13) =1a(14) =1a(15) =0a(16) =0a(17) =2a(18) =2a(19) =0a(20) =2a(21) =0a(22) =0a(23) =1a(24) =2a(25) =2a(26) =0a(27) =1a(28) =0a(29) =1

External references